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Understanding Celestial Coordinates: A Junior Navigation Quiz

Test your knowledge of celestial coordinates with this quiz focused on the General Position (GP) of the sun and how to calculate essential navigational parameters such as Greenwich Hour Angle (GHA), declination, and Local Hour Angle (LHA). This chapter covers critical concepts in navigation, helping you determine your position using GPS in relation to the sun's position overhead. Engage with fill-in-the-blank questions to reinforce your understanding of angular distances related to meridians and parallels. Dive into the fascinating world of celestial navigation!

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Understanding Celestial Coordinates: A Junior Navigation Quiz

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  1. Celestial Coordinates Quiz Q & A Junior Navigation Chapter 5

  2. 1. The coordinates of the GP of the sun are L 7° 09.5' S, Lo 150° 04.2' E. a. What are the GHA and declination of the sun at this time? GHA = 209° 55.8' [GHA = 360° - LoE] Dec = 7° 09.5'S b. If the LHA of the sun at the same time is 48°32.1' what is the observer's Lo? Lo = 161°23.7' W [LoW = GHA - LHA]

  3. 2. You have determined your position by GPS to be L 23° 01.8' N, Lo 76° 56.3'. You look up and see the sun directly overhead. What are the Declination, GHA, and LHA of the sun at this time? Declination of the sun 23° 01.8'N GHA of the sun 76°56.3' LHA of the sun 000°

  4. 3. All meridians of longitude and parallels of latitude are great circles. • True • b. False

  5. 4. Fill in the blanks in the following statements about celestial coordinates: a. __________is the angular distance of the GP of a body north or south of the equator. b. ___________________is the angular distance from the Greenwich meridian westward to the hour circle of a body. c. ______________ is the angular distance from an observer's local meridian westward to the hour circle of a body. Declination Greenwich Hour Angle Local Hour Angle

  6. Q7 Celestial Coordinates End Of Quiz Q & A Junior Navigation Chapter 5

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